本文選題：圍巖穩(wěn)定性　切入點：非對稱載荷　出處：《西安科技大學》2015年碩士論文

【摘要】：大傾角松軟厚煤層綜放工作面運輸巷圍巖應力環(huán)境復雜,頂板易冒落,支護困難,影響礦井安全生產(chǎn)。研究大傾角松軟厚煤層綜放工作面運輸巷支護技術,對豐富復雜條件下回采巷道支護技術具有重要意義。本文針對長山子煤礦1123綜放工作面運輸巷,通過現(xiàn)場調(diào)研、模擬研究、理論分析和現(xiàn)場監(jiān)測相結合的研究方法,對大傾角松軟厚煤層綜放工作面運輸巷圍巖進行了較為系統(tǒng)地研究,結果表明:(1)支護體受載和圍巖變形破壞呈非對稱性特征。巷道以頂板失穩(wěn)為特點,失穩(wěn)形式分為兩種,一種為從下幫側拱角處誘發(fā)的圍巖失穩(wěn),圍巖首先從下幫側拱角處發(fā)生破壞,破壞方式為:產(chǎn)生裂隙—彎曲—斷裂—回轉(zhuǎn)—垮落,頂板垮落過程分為回轉(zhuǎn)垮落和下沉垮落,另一種為頂板離層誘發(fā)的頂板失穩(wěn),該失穩(wěn)方式以下沉垮落為特點。(2)直墻圓弧拱形巷道下幫側拱角處是 圍巖-支護‖結構體失穩(wěn)誘發(fā)點,較矩形巷道,其圍巖結構最大剪力平均降低46.5%,最大彎矩平均降低56.5%。(3)巷道頂板淺基點和深基點的離層預警值可由上覆巖層載荷、巷道寬度、圍巖彈性模量、錨桿控制范圍及錨索特性確定,長山子煤礦1123綜放工作面運輸巷頂板離層儀淺基點預警值為60mm,深基點預警值為140mm。(4)采用綜掘工藝和以 大、小結構理論‖為基礎的錨網(wǎng)索+鋼筋梯協(xié)調(diào)支護技術確定支護參數(shù)為錨桿間排距800×800mm,錨索間距1200mm,排距為1600mm�！，F(xiàn)場監(jiān)測表明,錨索受載錨桿受載,頂板錨桿受載下幫錨桿受載上幫錨桿受載,巷道支護參數(shù)適合于1123綜放工作面運輸巷,取得了良好的經(jīng)濟效益。
[Abstract]:The surrounding rock stress environment of transportation roadway is complex, the roof caving is easy to fall and the support is difficult, which affects the safe production of coal mine. This paper studies the supporting technology of the transportation roadway of the fully-mechanized caving face in the large inclined soft and thick coal seam. This paper aims at the transportation roadway of 1123 fully-mechanized caving face of Changshanzi Coal Mine, through field investigation, simulation study, theoretical analysis and field monitoring. This paper makes a systematic study on the surrounding rock of the transportation roadway in the fully-mechanized caving face with large dip angle and soft and thick coal seam. The results show that the load-bearing and the deformation failure of the wall rock are asymmetrical. The roadway is characterized by roof instability, which is divided into two types. One is the instability of the surrounding rock induced by the arch corner of the lower side side. The failure of the surrounding rock occurs from the arch corner of the lower side side at first. The failure mode is as follows: fissure-bending, fracture, revolution and collapse, and the process of roof collapse is divided into rotary collapse and sinking collapse. The other is the roof instability induced by roof separation, which is characterized by subsidence and collapse. The arch corner of the bottom side of the arc-arched roadway with straight wall is the point induced by the instability of surrounding rock and support structure, which is more than that of rectangular roadway. The maximum shear force of surrounding rock structure is reduced by 46.5, and the maximum bending moment is reduced by 56.55.The maximum bending moment is reduced by 56.5and 56.50.The early warning values of shallow base point and deep base point of roadway roof can be determined by the load of overlying rock, the width of roadway, the elastic modulus of surrounding rock, the control range of anchor rod and the characteristic of anchor cable. In Changshanzi Coal Mine 1123 fully mechanized caving face, the early warning value of shallow base point and 140mm. 4) is 60mm and 140mm respectively. Based on the theory of small structure, the supporting parameters are determined as 800 脳 800mm between anchors, 1200mm between anchors and 1600mm.The field monitoring shows that the anchor cables are loaded with anchors, and the supporting parameters are determined as 800 脳 800mm, 1200mm and 1600mm.The results of field monitoring show that the anchor cables are loaded. The roof bolt is loaded and the upper side bolt is loaded and the supporting parameters of roadway are suitable for the transportation roadway of 1123 fully mechanized caving face and good economic benefits have been obtained.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD353

【相似文獻】

相關期刊論文 前10條

1 任開朗;綜采工作面運輸巷側大小工作面對接工藝[J];雞西大學學報;2005年04期

2 闞世光;上下煤層同采時工作面運輸巷位置合理確定[J];江蘇煤炭;2004年03期

3 鄭亞東;胡洪濤;康守昌;;對2109工作面運輸巷逆斷層的探測[J];中州煤炭;2006年06期

4 王剛,馬繼新;綜放工作面運輸巷側對接延長的實踐[J];煤炭科技;2004年03期

5 馬運峰;孔慶康;姜瑞;孫福立;;綜放工作面運輸巷端頭放頂煤支架的研究與應用[J];礦山機械;2011年01期

6 李文利,常濤;綜放工作面運輸巷層位布置的探討[J];中州煤炭;2003年06期

7 張金海;;1473工作面運輸巷改造施工工藝[J];水力采煤與管道運輸;2008年01期

8 孫建嶺;;新型重載噴霧滅塵裝置的研制與應用[J];煤礦機電;2011年04期

9 王曉波;遲乃俊;王濤;;“軟巖”綜放工作面運輸巷縮面技術研究與應用[J];山東煤炭科技;2010年05期

10 于明獻;張宏軍;李國印;楊富鋒;李治敏;盧廣銀;;對拉工作面運輸巷替棚工藝探討[J];煤炭技術;2006年08期

相關碩士學位論文 前1條

1 趙平風;長山子煤礦大傾角松軟厚煤層綜放工作面運輸巷支護技術研究[D];西安科技大學;2015年

，

本文編號：1677278